Sand mulling machine



Jan. 24:, 1933. AG, R 1,895,006

SAND MULLING MACHINE Filed Feb. 14. 1931 4 Sheets-Sheet 1 Jan. 24, 1933. J RAPP 1,895,006

SAND MULLING MACHINE Filed Feb. 14, 1931 '4 Sheets-Sheet 2 m 516/ GO JEczfi i Jan. 24, 1933. A. a; J. RAPP SAND MULLING MACHINE Filed Feb. 14, 1931 4 Sheets-Sheet 3 Jan. 24, 1933. J, P 1,895,006

SAND MULLING MACHINE Filed Feb. 14, 1931 4 Sheets-Sheet 4 fize] 61 [Bap a Patented Jan. 24, 1933 UNITED STATES PATENT OFFICE Ami J. RAPID, OI CHICAGO, ILLINOIS, ASSIGNOB- 'I'O HERBERT S. SIMPSON, OF CHICAGO, ILLINOIS SAND MULLING MACHINE Application filed February 14, 1931. Serial No. 515,774.

This invention relates to sand mulling machines and concerns itself with a structure wherein the cooperating mulling elements are relatively shiftable during the operation 5 of the machine and in which means are provided for discharging the sand during the relative shifting movement of the mulling elements. The invention embodies secondary features of construction whereby the sand in 1. the mulling machine may be' properly moistened in advance of the mulling elements and in which the delivery of the sand tothe machine may be readily controlled.

The invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the appended claims.

In the accompanying drawings which illustrate a preferred form of this invention, and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a front elevational view of a mulling machine involving this invention.

Figure 2 is a top plan view of such machine.

Figure 3 is a sectional View of such machine, showing parts in elevation.

Figure 4 is an enlarged sectional View talren upon the line IV-IV of Figure 3, looking downwardly.

Figure 5 is a fragmentary vertical sectional yiew showing parts in elevation and illustrating the operation of certain features.

In the illustrated embodiment of this in- 35 vention, there is shown a supporting base for the mulling pan which consists of suitable end and side members 1 and longitudinally extending beams 2 suitably connected together. The beams 2 support suitable bearings 3 in which the shafts 4 are journalled.

These shafts 4 carry spaced flanged rollers or wheels 5 upon which the mulling pan 6 is adapted to be reciprocably supported. To

this end, the bottom of the mulling pan is provided with suitable tracks 7 for engaging the rollers.

From the base structure, there extend suitable upright frame members 8 which supr port the super-structure of the frame which super-structure preferably consists of suitable channel members 9 and 10, suitably secured together to provide a rigid supporting structure for the operating parts of the machine. A cover plate 11 is preferably placed over the super-structure to provide a 55 platform. I

A pair of mullers in the form of wheels or rollers 13 supported upon a cross head 12 are adapted or operatin over the mulling pan. This cross head 12 is connected with a "ertical shaft 14 which extends through a vertical sleeve 15 in which it is journalled. The upper end of the sleeve 15 is provided with a head 16 that rests upon the cover plate 7 and above this head 16 there is a lubricant casmg 17 in which a shaft is journalled. The shaft 20 carries a beveled gear 19 which meshes with a beveled gear 18 upon the upper end of the vertical shaft 14, whereby the spider or cross head 12 is adapted to be rotated. The rear end of the shaft 20 projects through the casing 17 and is geared to a suitable motor 21, as shown in Figure 2. The shaft 20 is suitably geared to a transverse shaft 22 which is supported in suitable bearings 23 upon the top plate 11, as shown more clearly in Figures 1 and 2. The ends of the transverse shaft 22 are provided with cranks 24 which are connected to pitmen 25. A pair of bell-crank levers are suitably pivoted upon the base in vertical alignment with the pitmen 25. Each pitman 25 is connected to one arm 26 of each bell-crank lever. The other arm 27 of each bell-crank lever is connected to one end of a link 28. The other end of each link 28 is pivoted to the bottom of the mulling pan, as shown in Figure 3. It will be evident that rotation of the shaft 22 will raise and lower the pitmen 25 and actuate the bellcrank levers for imparting a reciprocating movement to the mulling pan 6.

A shaft 29 is suitably supported in brackets extending from the vertical uprights 8 and the arms 31 of a discharging element are rigidly secured upon this shaft, as shown in Figure 4. This discharging element 30 is in the form of a curved plate and is adapted for contacting the upper surface of the mulling pan 6, as shown in Figure 3. A pair of fingers 32-are rigidly secured upon the shaft 100 29 and are suitably spaced apart so that each one lies in the path of a projectin stud 33 secured to a collar 34 upon each pitman 25. The construction is such that when the pitmen 25 are lowered as shown in Figure 5 the studs 33 will engage the fingers 32 and elevate the discharging element 30 as shown in Figure 5. It will be noted that at this particular stage of the operation the mulling table 6 is at its forward. oint of reciprocation. Now, when the sha t 22 starts to rotate for elevating the pitmen 25 or starting the same upon its up-stroke, the cranks upon said shaft will swing the pitmen 25 outwardly so as to free the fingers 32 and allow the dischargin element 30 to drop by gravity upon the mul ing pan with the result that, as the pitmen 25 continue their upward movement and the pan 6 is reciprocated rearwardly, the sand that is in front of the discharging element 30 will be discharged into the chute 35 (Figure 3). Below the chute 35, there is diagrammatically shown a conveyor 36 for removing the sand.

A fluid container 37 is mounted upon the spider or cross head 12 for rotation therewith. A pair of spraying nozzles or pipes 38 extend from the bottom of the fluid chamber 37 and are designed for sprinkling or spraying the fluid in front of the rotating muller wheels 13.

Adjacent the rear end of the machine, there is a delivery chute 39 which is shown as inclined downwardly toward the mulling pan for delivering sand thereto.

Referring to Figure 3, it will be noted that the inner wall 40 of the delivery chute is provided with an adjustable gate 45 having a bolt and slot connection with the wall, where by the same may be raised or lowered to regulate the amount of sand that may be fed to the mulling pan. The sandthat is being fed to the mulling pan is adapted to be distributed by suitable racks or plows 46 which rotate with the cross head or spider 12 so that the same may be evenly spread over the mullin pan, and may be gathered into the path 0 the mulling rollers 13. YVhile the operation of the machine is obvious from the foregoing description, a brief summary shall be given:

When the motor on the mulling machine is set in motion, the spider will be rotated carrying the fluid chamber therewith. The fluid nozzles will spray the fluid in front of the wheels as they are being revolved. The rotation of the shaft 20 that rotates the mulling wheels, also rotates the shaft 22 which reciprocates the pitmen 25 for oscillating or reciprocating the mulling pan 6 relatively to the mulling rollers 13. The actuation of the pitmen 25 also controls the sand discharging element 30 as previously explained. It will be particularly noted that the discharging element descends upon the mulling pan behind a quantity of sand andremains in contact therewith while the mulling pan is being reciprocated to the right, as viewed in Figure 3, so that relative movement of the mulling pan and dischar ing element 30 will sweep the sand from o the mulling pan and into the chute 35 from which it drops upon a suitable conveyor.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departin from the principles of this invention, an I, therefore, do not purpose limiting the patent granted hereon otherwise than is necessitated by the prior art.

I claim as my invention:

1. In a sand mulling machine, a mulling pan, means for mounting said pan for reciprocating movement, a sand discharging element having vertical movement with respect to said pan, mechanism for reciprocating said pan and operating said discharging element, mullers mounted in said pan, and means for rotating said mullers during the reciprocation of said pan. v

2. In a sand mulling machine, a base structure, a mulling pan, means for mounting said pan for reciprocating movements upon said base structure, mullers in said pan, mechanism for operating said mullers, a shaft.

driven by said mechanism, cranks upon said shaft, pitmen connected ,to said cranks, bell crank levers pivoted to said base and connected to said pitmen, and links connecting said bell crank levers and pan.

3. In a sand mulling machine, a base structure, a mulling pan, means for supporting said pan upon said base structure for reciprocating movements, a vertically swingable sand discharging element, means including a pitman for reciprocating said pan and cooperating means between said pitman and discharging element for elevating the latter.

In testimony whereof I have hereunto subscribed my name at Chicago, Cook County,

Illinois.

AXEL G. J. RAPP. 

